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Simon Schwarz0a672d42012-03-15 04:01:45 +00001/* Copyright (C) 2011
2 * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
3 * - Added prep subcommand support
4 * - Reorganized source - modeled after powerpc version
5 *
wdenkc6097192002-11-03 00:24:07 +00006 * (C) Copyright 2002
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
9 *
10 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
11 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020012 * SPDX-License-Identifier: GPL-2.0+
wdenkc6097192002-11-03 00:24:07 +000013 */
14
15#include <common.h>
16#include <command.h>
wdenkc6097192002-11-03 00:24:07 +000017#include <image.h>
Jean-Christophe PLAGNIOL-VILLARDa31e0912009-04-04 12:49:11 +020018#include <u-boot/zlib.h>
wdenkc6097192002-11-03 00:24:07 +000019#include <asm/byteorder.h>
John Rigby2d1916e2010-10-13 13:57:36 -060020#include <libfdt.h>
21#include <fdt_support.h>
Simon Schwarz0a672d42012-03-15 04:01:45 +000022#include <asm/bootm.h>
Pali Rohár89e6f132012-10-19 02:00:04 +000023#include <linux/compiler.h>
wdenkc6097192002-11-03 00:24:07 +000024
Andre Przywarad4296882013-09-19 18:06:45 +020025#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
Andre Przywarabb975452013-09-19 18:06:43 +020026#include <asm/armv7.h>
27#endif
28
Wolfgang Denkd87080b2006-03-31 18:32:53 +020029DECLARE_GLOBAL_DATA_PTR;
30
wdenkc6097192002-11-03 00:24:07 +000031static struct tag *params;
John Rigby2d1916e2010-10-13 13:57:36 -060032
Simon Schwarz0a672d42012-03-15 04:01:45 +000033static ulong get_sp(void)
34{
35 ulong ret;
36
37 asm("mov %0, sp" : "=r"(ret) : );
38 return ret;
39}
40
John Rigby2d1916e2010-10-13 13:57:36 -060041void arch_lmb_reserve(struct lmb *lmb)
42{
43 ulong sp;
44
45 /*
46 * Booting a (Linux) kernel image
47 *
48 * Allocate space for command line and board info - the
49 * address should be as high as possible within the reach of
50 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
51 * memory, which means far enough below the current stack
52 * pointer.
53 */
54 sp = get_sp();
55 debug("## Current stack ends at 0x%08lx ", sp);
56
Rob Herringfcfa6962012-06-28 03:54:11 +000057 /* adjust sp by 4K to be safe */
58 sp -= 4096;
John Rigby2d1916e2010-10-13 13:57:36 -060059 lmb_reserve(lmb, sp,
60 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
61}
62
Simon Glassbce1b922013-06-19 21:15:10 -070063/**
64 * announce_and_cleanup() - Print message and prepare for kernel boot
65 *
66 * @fake: non-zero to do everything except actually boot
67 */
68static void announce_and_cleanup(int fake)
Simon Schwarz0a672d42012-03-15 04:01:45 +000069{
Simon Glassbce1b922013-06-19 21:15:10 -070070 printf("\nStarting kernel ...%s\n\n", fake ?
71 "(fake run for tracing)" : "");
Simon Schwarz0a672d42012-03-15 04:01:45 +000072 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
Simon Glass94fd1312012-09-28 08:56:37 +000073#ifdef CONFIG_BOOTSTAGE_FDT
Mela Custodio91290cf2014-02-20 00:16:56 +090074 bootstage_fdt_add_report();
Simon Glass94fd1312012-09-28 08:56:37 +000075#endif
Simon Schwarz0a672d42012-03-15 04:01:45 +000076#ifdef CONFIG_BOOTSTAGE_REPORT
77 bootstage_report();
78#endif
79
80#ifdef CONFIG_USB_DEVICE
81 udc_disconnect();
82#endif
83 cleanup_before_linux();
84}
85
wdenk5779d8d2003-12-06 23:55:10 +000086static void setup_start_tag (bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +000087{
Simon Schwarz0a672d42012-03-15 04:01:45 +000088 params = (struct tag *)bd->bi_boot_params;
wdenkc6097192002-11-03 00:24:07 +000089
wdenk5779d8d2003-12-06 23:55:10 +000090 params->hdr.tag = ATAG_CORE;
91 params->hdr.size = tag_size (tag_core);
wdenkc6097192002-11-03 00:24:07 +000092
wdenk5779d8d2003-12-06 23:55:10 +000093 params->u.core.flags = 0;
94 params->u.core.pagesize = 0;
95 params->u.core.rootdev = 0;
wdenkc6097192002-11-03 00:24:07 +000096
wdenk5779d8d2003-12-06 23:55:10 +000097 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +000098}
wdenkc6097192002-11-03 00:24:07 +000099
Simon Schwarz0a672d42012-03-15 04:01:45 +0000100static void setup_memory_tags(bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000101{
wdenk5779d8d2003-12-06 23:55:10 +0000102 int i;
wdenkc6097192002-11-03 00:24:07 +0000103
wdenk5779d8d2003-12-06 23:55:10 +0000104 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
105 params->hdr.tag = ATAG_MEM;
106 params->hdr.size = tag_size (tag_mem32);
wdenkc6097192002-11-03 00:24:07 +0000107
wdenk5779d8d2003-12-06 23:55:10 +0000108 params->u.mem.start = bd->bi_dram[i].start;
109 params->u.mem.size = bd->bi_dram[i].size;
wdenkc6097192002-11-03 00:24:07 +0000110
wdenk5779d8d2003-12-06 23:55:10 +0000111 params = tag_next (params);
112 }
wdenkc6097192002-11-03 00:24:07 +0000113}
114
Simon Schwarz0a672d42012-03-15 04:01:45 +0000115static void setup_commandline_tag(bd_t *bd, char *commandline)
wdenkc6097192002-11-03 00:24:07 +0000116{
wdenk5779d8d2003-12-06 23:55:10 +0000117 char *p;
wdenkc6097192002-11-03 00:24:07 +0000118
wdenk109c0e32004-03-23 21:43:07 +0000119 if (!commandline)
120 return;
121
wdenk5779d8d2003-12-06 23:55:10 +0000122 /* eat leading white space */
123 for (p = commandline; *p == ' '; p++);
wdenkc6097192002-11-03 00:24:07 +0000124
wdenk5779d8d2003-12-06 23:55:10 +0000125 /* skip non-existent command lines so the kernel will still
126 * use its default command line.
127 */
128 if (*p == '\0')
129 return;
wdenkc6097192002-11-03 00:24:07 +0000130
wdenk5779d8d2003-12-06 23:55:10 +0000131 params->hdr.tag = ATAG_CMDLINE;
132 params->hdr.size =
133 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
wdenkc6097192002-11-03 00:24:07 +0000134
wdenk5779d8d2003-12-06 23:55:10 +0000135 strcpy (params->u.cmdline.cmdline, p);
wdenkc6097192002-11-03 00:24:07 +0000136
wdenk5779d8d2003-12-06 23:55:10 +0000137 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000138}
wdenkc6097192002-11-03 00:24:07 +0000139
Simon Schwarz0a672d42012-03-15 04:01:45 +0000140static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
wdenkc6097192002-11-03 00:24:07 +0000141{
wdenk5779d8d2003-12-06 23:55:10 +0000142 /* an ATAG_INITRD node tells the kernel where the compressed
143 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
144 */
wdenk498b8db2004-04-18 22:26:17 +0000145 params->hdr.tag = ATAG_INITRD2;
wdenk5779d8d2003-12-06 23:55:10 +0000146 params->hdr.size = tag_size (tag_initrd);
wdenkc6097192002-11-03 00:24:07 +0000147
wdenk5779d8d2003-12-06 23:55:10 +0000148 params->u.initrd.start = initrd_start;
149 params->u.initrd.size = initrd_end - initrd_start;
wdenkc6097192002-11-03 00:24:07 +0000150
wdenk5779d8d2003-12-06 23:55:10 +0000151 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000152}
wdenkc6097192002-11-03 00:24:07 +0000153
Simon Glassc19d13b2013-05-08 08:06:02 +0000154static void setup_serial_tag(struct tag **tmp)
wdenk3a574cb2005-05-19 22:39:42 +0000155{
156 struct tag *params = *tmp;
157 struct tag_serialnr serialnr;
wdenk3a574cb2005-05-19 22:39:42 +0000158
159 get_board_serial(&serialnr);
160 params->hdr.tag = ATAG_SERIAL;
161 params->hdr.size = tag_size (tag_serialnr);
162 params->u.serialnr.low = serialnr.low;
163 params->u.serialnr.high= serialnr.high;
164 params = tag_next (params);
165 *tmp = params;
166}
wdenk3a574cb2005-05-19 22:39:42 +0000167
Simon Glassc19d13b2013-05-08 08:06:02 +0000168static void setup_revision_tag(struct tag **in_params)
wdenk289f9322005-01-12 00:15:14 +0000169{
170 u32 rev = 0;
wdenk289f9322005-01-12 00:15:14 +0000171
172 rev = get_board_rev();
wdenk289f9322005-01-12 00:15:14 +0000173 params->hdr.tag = ATAG_REVISION;
174 params->hdr.size = tag_size (tag_revision);
175 params->u.revision.rev = rev;
176 params = tag_next (params);
177}
wdenk289f9322005-01-12 00:15:14 +0000178
Simon Schwarz0a672d42012-03-15 04:01:45 +0000179static void setup_end_tag(bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000180{
wdenk5779d8d2003-12-06 23:55:10 +0000181 params->hdr.tag = ATAG_NONE;
182 params->hdr.size = 0;
wdenkc6097192002-11-03 00:24:07 +0000183}
184
Pali Rohár89e6f132012-10-19 02:00:04 +0000185__weak void setup_board_tags(struct tag **in_params) {}
186
Andre Przywarabb975452013-09-19 18:06:43 +0200187static void do_nonsec_virt_switch(void)
188{
189#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
190 if (armv7_switch_nonsec() == 0)
Andre Przywarad4296882013-09-19 18:06:45 +0200191#ifdef CONFIG_ARMV7_VIRT
192 if (armv7_switch_hyp() == 0)
193 debug("entered HYP mode\n");
194#else
Andre Przywarabb975452013-09-19 18:06:43 +0200195 debug("entered non-secure state\n");
196#endif
Andre Przywarad4296882013-09-19 18:06:45 +0200197#endif
David Feng0ae76532013-12-14 11:47:35 +0800198
199#ifdef CONFIG_ARM64
200 smp_kick_all_cpus();
York Sun88590142014-03-31 14:40:32 -0700201 flush_dcache_all(); /* flush cache before swtiching to EL2 */
David Feng0ae76532013-12-14 11:47:35 +0800202 armv8_switch_to_el2();
203#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
204 armv8_switch_to_el1();
205#endif
206#endif
Andre Przywarabb975452013-09-19 18:06:43 +0200207}
208
Simon Schwarz0a672d42012-03-15 04:01:45 +0000209/* Subcommand: PREP */
210static void boot_prep_linux(bootm_headers_t *images)
211{
Simon Schwarz0a672d42012-03-15 04:01:45 +0000212 char *commandline = getenv("bootargs");
Simon Schwarz0a672d42012-03-15 04:01:45 +0000213
Simon Glassc19d13b2013-05-08 08:06:02 +0000214 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000215#ifdef CONFIG_OF_LIBFDT
Simon Schwarz0a672d42012-03-15 04:01:45 +0000216 debug("using: FDT\n");
Simon Glass6caa1952013-05-08 08:06:03 +0000217 if (image_setup_linux(images)) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000218 printf("FDT creation failed! hanging...");
219 hang();
220 }
Simon Schwarz0a672d42012-03-15 04:01:45 +0000221#endif
Simon Glassc19d13b2013-05-08 08:06:02 +0000222 } else if (BOOTM_ENABLE_TAGS) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000223 debug("using: ATAGS\n");
224 setup_start_tag(gd->bd);
Simon Glassc19d13b2013-05-08 08:06:02 +0000225 if (BOOTM_ENABLE_SERIAL_TAG)
226 setup_serial_tag(&params);
227 if (BOOTM_ENABLE_CMDLINE_TAG)
228 setup_commandline_tag(gd->bd, commandline);
229 if (BOOTM_ENABLE_REVISION_TAG)
230 setup_revision_tag(&params);
231 if (BOOTM_ENABLE_MEMORY_TAGS)
232 setup_memory_tags(gd->bd);
233 if (BOOTM_ENABLE_INITRD_TAG) {
234 if (images->rd_start && images->rd_end) {
235 setup_initrd_tag(gd->bd, images->rd_start,
236 images->rd_end);
237 }
238 }
Pali Rohár89e6f132012-10-19 02:00:04 +0000239 setup_board_tags(&params);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000240 setup_end_tag(gd->bd);
Simon Glassc19d13b2013-05-08 08:06:02 +0000241 } else {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000242 printf("FDT and ATAGS support not compiled in - hanging\n");
243 hang();
Simon Schwarz0a672d42012-03-15 04:01:45 +0000244 }
Andre Przywarabb975452013-09-19 18:06:43 +0200245 do_nonsec_virt_switch();
Simon Schwarz0a672d42012-03-15 04:01:45 +0000246}
247
248/* Subcommand: GO */
Simon Glassbce1b922013-06-19 21:15:10 -0700249static void boot_jump_linux(bootm_headers_t *images, int flag)
Simon Schwarz0a672d42012-03-15 04:01:45 +0000250{
David Feng0ae76532013-12-14 11:47:35 +0800251#ifdef CONFIG_ARM64
252 void (*kernel_entry)(void *fdt_addr);
253 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
254
255 kernel_entry = (void (*)(void *fdt_addr))images->ep;
256
257 debug("## Transferring control to Linux (at address %lx)...\n",
258 (ulong) kernel_entry);
259 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
260
261 announce_and_cleanup(fake);
262
263 if (!fake)
264 kernel_entry(images->ft_addr);
265#else
Simon Schwarz0a672d42012-03-15 04:01:45 +0000266 unsigned long machid = gd->bd->bi_arch_number;
267 char *s;
268 void (*kernel_entry)(int zero, int arch, uint params);
Stephen Warren17239972012-04-19 11:34:00 +0000269 unsigned long r2;
Simon Glassbce1b922013-06-19 21:15:10 -0700270 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000271
272 kernel_entry = (void (*)(int, int, uint))images->ep;
273
274 s = getenv("machid");
275 if (s) {
276 strict_strtoul(s, 16, &machid);
277 printf("Using machid 0x%lx from environment\n", machid);
278 }
279
280 debug("## Transferring control to Linux (at address %08lx)" \
281 "...\n", (ulong) kernel_entry);
282 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
Simon Glassbce1b922013-06-19 21:15:10 -0700283 announce_and_cleanup(fake);
Stephen Warren17239972012-04-19 11:34:00 +0000284
Simon Glassc19d13b2013-05-08 08:06:02 +0000285 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
Stephen Warren17239972012-04-19 11:34:00 +0000286 r2 = (unsigned long)images->ft_addr;
287 else
Stephen Warren17239972012-04-19 11:34:00 +0000288 r2 = gd->bd->bi_boot_params;
289
Simon Glassbce1b922013-06-19 21:15:10 -0700290 if (!fake)
291 kernel_entry(0, machid, r2);
David Feng0ae76532013-12-14 11:47:35 +0800292#endif
Simon Schwarz0a672d42012-03-15 04:01:45 +0000293}
294
295/* Main Entry point for arm bootm implementation
296 *
297 * Modeled after the powerpc implementation
298 * DIFFERENCE: Instead of calling prep and go at the end
299 * they are called if subcommand is equal 0.
300 */
301int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
302{
303 /* No need for those on ARM */
304 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
305 return -1;
306
307 if (flag & BOOTM_STATE_OS_PREP) {
308 boot_prep_linux(images);
309 return 0;
310 }
311
Simon Glassbce1b922013-06-19 21:15:10 -0700312 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
313 boot_jump_linux(images, flag);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000314 return 0;
315 }
316
317 boot_prep_linux(images);
Simon Glassbce1b922013-06-19 21:15:10 -0700318 boot_jump_linux(images, flag);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000319 return 0;
John Rigby2d1916e2010-10-13 13:57:36 -0600320}
Marek Vasut44f074c2012-03-14 21:52:45 +0000321
322#ifdef CONFIG_CMD_BOOTZ
323
324struct zimage_header {
325 uint32_t code[9];
326 uint32_t zi_magic;
327 uint32_t zi_start;
328 uint32_t zi_end;
329};
330
331#define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
332
Simon Glassa5266d62013-07-04 13:26:10 -0700333int bootz_setup(ulong image, ulong *start, ulong *end)
Marek Vasut44f074c2012-03-14 21:52:45 +0000334{
Simon Glassa5266d62013-07-04 13:26:10 -0700335 struct zimage_header *zi;
Marek Vasut44f074c2012-03-14 21:52:45 +0000336
Simon Glassa5266d62013-07-04 13:26:10 -0700337 zi = (struct zimage_header *)map_sysmem(image, 0);
Marek Vasut44f074c2012-03-14 21:52:45 +0000338 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
339 puts("Bad Linux ARM zImage magic!\n");
340 return 1;
341 }
342
Simon Glassa5266d62013-07-04 13:26:10 -0700343 *start = zi->zi_start;
344 *end = zi->zi_end;
Marek Vasut44f074c2012-03-14 21:52:45 +0000345
Simon Glassa5266d62013-07-04 13:26:10 -0700346 printf("Kernel image @ %#08lx [ %#08lx - %#08lx ]\n", image, *start,
347 *end);
Marek Vasut44f074c2012-03-14 21:52:45 +0000348
349 return 0;
350}
Simon Glassa5266d62013-07-04 13:26:10 -0700351
Marek Vasut44f074c2012-03-14 21:52:45 +0000352#endif /* CONFIG_CMD_BOOTZ */
Miao Yan871a57b2013-11-28 17:51:38 +0800353
354#if defined(CONFIG_BOOTM_VXWORKS)
355void boot_prep_vxworks(bootm_headers_t *images)
356{
357#if defined(CONFIG_OF_LIBFDT)
358 int off;
359
360 if (images->ft_addr) {
361 off = fdt_path_offset(images->ft_addr, "/memory");
362 if (off < 0) {
363 if (arch_fixup_memory_node(images->ft_addr))
364 puts("## WARNING: fixup memory failed!\n");
365 }
366 }
367#endif
368 cleanup_before_linux();
369}
370void boot_jump_vxworks(bootm_headers_t *images)
371{
372 /* ARM VxWorks requires device tree physical address to be passed */
373 ((void (*)(void *))images->ep)(images->ft_addr);
374}
375#endif